Ultra-dispersive resonator readout of a quantum-dot qubit using longitudinal coupling

Benjamin Harpt; J. Corrigan; Nathan Holman; Piotr Marciniec; D. Rosenberg; D. Yost; R. Das; Rusko Ruskov; Charles Tahan; William D. Oliver; R. McDermott; Mark Friesen; M. A. Eriksson

doi:10.1038/s41534-025-00962-w

Ultra-dispersive resonator readout of a quantum-dot qubit using longitudinal coupling

Mesoscale and Nanoscale Physics 2025-01-28 v3 Quantum Physics

Authors: Benjamin Harpt , J. Corrigan , Nathan Holman , Piotr Marciniec , D. Rosenberg , D. Yost , R. Das , Rusko Ruskov , Charles Tahan , William D. Oliver , R. McDermott , Mark Friesen , M. A. Eriksson

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Abstract

We perform readout of a quantum-dot hybrid qubit coupled to a superconducting resonator through a parametric, longitudinal interaction mechanism. Our experiments are performed with the qubit and resonator frequencies detuned by $\sim$ 10 GHz, demonstrating that longitudinal coupling can facilitate semiconductor qubit operation in the 'ultra-dispersive' regime of circuit quantum electrodynamics.

Keywords

circuit quantum electrodynamics superconducting qubits quantum decoherence in superconducting qubits

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@article{arxiv.2407.08869,
  title  = {Ultra-dispersive resonator readout of a quantum-dot qubit using longitudinal coupling},
  author = {Benjamin Harpt and J. Corrigan and Nathan Holman and Piotr Marciniec and D. Rosenberg and D. Yost and R. Das and Rusko Ruskov and Charles Tahan and William D. Oliver and R. McDermott and Mark Friesen and M. A. Eriksson},
  journal= {arXiv preprint arXiv:2407.08869},
  year   = {2025}
}

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Main text and Supplementary Information; 13 pages, 7 figures

Ultra-dispersive resonator readout of a quantum-dot qubit using longitudinal coupling

Abstract

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